EP 0099435 B1 19870107 - METHOD OF STIRRING MOLTEN METAL AND REFRACTORY CYLINDER FOR THE PURPOSE
Title (en)
METHOD OF STIRRING MOLTEN METAL AND REFRACTORY CYLINDER FOR THE PURPOSE
Publication
Application
Priority
- JP 12628482 A 19820720
- JP 12628582 A 19820720
- JP 12628682 A 19820720
- JP 12628782 A 19820720
Abstract (en)
[origin: US4452634A] A method of stirring molten metal by repeatedly sucking and rapidly discharging part of the molten metal into and out of a refractory cylinder having a lower opening end immersed in the molten metal in a ladle, comprises operating the stirring under a condition that an inner diameter (d) of the refractory cylinder is less than 1,000 mm, a relation between the inner diameter (d, mm) of the refractory cylinder and weight (W, ton) of the molten metal in the ladle is d/W0.5>30, and an immersed depth of the refractory cylinder is within 200-700 mm. A pressurized gas for discharging the sucked molten metal out of the cylinder is introduced thereinto in an inclined direction relative to a vertical line against a point on an opposite inner wall of the cylinder at least 500 mm above the maximum suction level of the molten metal in the cylinder. A refractory cylinder operated in the above manner according to the invention comprises a flange connection between an uppermost and an intermediate cylinder parts of the cylinder at a location higher than the maximum suction height of the molten metal and a further flange connection between the intermediate cylinder part and a lowermost cylinder part. The refractory cylinder comprises at its immersed end a flow restricting opening to obtain more strong stirring the molten metal.
IPC 1-7
IPC 8 full level
B01F 5/10 (2006.01); B01F 11/00 (2006.01); C21C 7/00 (2006.01); C21C 7/10 (2006.01); C22B 9/02 (2006.01); C22B 21/00 (2006.01); F27D 27/00 (2010.01)
CPC (source: EP US)
B01F 25/50 (2022.01 - EP US); B01F 31/65 (2022.01 - EP US); B01F 31/651 (2022.01 - EP US); C21C 7/0037 (2013.01 - EP US); C21C 7/10 (2013.01 - EP US); C22B 9/02 (2013.01 - EP US); C22B 21/0084 (2013.01 - EP US); F27D 27/00 (2013.01 - EP US); F27D 27/007 (2013.01 - EP US); Y02P 10/20 (2015.11 - EP US)
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
EP 0099435 A1 19840201; EP 0099435 B1 19870107; BR 8206602 A 19840529; CA 1196196 A 19851105; DE 3275005 D1 19870212; US 4452634 A 19840605
DOCDB simple family (application)
EP 82305849 A 19821103; BR 8206602 A 19821112; CA 414943 A 19821104; DE 3275005 T 19821103; US 43751482 A 19821029